Resistor
Why Is a Resistor Necessary? Can we use a jumper wire connect to VCC or GND to setup the default state for button instead of using resistor? it…
Internal Pull-Up and Pull-Down
The ESP32 has built-in pull-up and pull-down resistors, which can be enabled in software using the pinMode() function. The resistance values for the internal pull-up and pull-down resistors…
Connecting a Button to an ESP32
In this chapter, we’ll learn how to connect a button to the ESP32 GPIO pin 22, explore the difference between connecting the button to 3.3V or GND, understand…
GPIO Default State
Before connecting a button to an MCU’s GPIO, we must use a resistor to set up the default GPIO state. The GPIO pin’s default state can be one…
LED Control Panel
We have learned how to display dynamic information using a Web Server. In this project, we will take it a step further by enabling interaction with the user…
Sensor Dashboard
In this project, we will create an ESP32 web server that displays real-time data from a connected light sensor. Most of the code is the same as the…
Hello World
In the ESP32, hosting a web server is straightforward, allowing us to display data from the ESP32, such as sensor information, or even gather input from users. In…
Code Refactoring
To avoid repeating Wi-Fi connection code, we can abstract the connection process into a separate function and save it in a separate file. On the right side of…
WiFi Manager
The WiFiManager library simplifies the process of connecting an ESP32 to Wi-Fi networks by creating a captive portal for the user to input the Wi-Fi credentials. This is…